JFaS is a super smart dude who contributes a lot to this board, but the way he baits people into arguments is super irritating. He could get his point across in a much less polarizing manner (even if he isn't trying to be polarizing.. i.e. my way is not always the highway).
I've only read a few of Gruber's posts but I got a headache from at least three of them so he's got the edge in retard points. It's impossible to deny that some of the stuff JFaS has produced is legit. It's like saying that the world is flat.
But I could not imagine getting a beer on a Friday night at the Dome (after a long f***ing work week) only to break into a dead serious conversation regarding DiPS or other advanced statistical stuff. I'd rather drink beer and check out the two blonde hunnies down in the front row while waiting for some dingerz. But I'd gladly go home and read some articles on Fangraphs after the game or during my downtime. Best of both worlds.
Both groups stress themselves out unnecessarily. The older, traditional folks get their panties in a bunch calling the SABR guys nerds and dorks while the younger, more technical guys take the sarcasm/snark to a whole different level.